A Florida-based company that boasts selling the world's first and only federally approved radio microchip for implanting in humans is now turning its development branch toward "emergency preparedness," hoping to produce an implant that can automatically detect in its host's bloodstream the presence of swine flu or other viruses deemed a "bio-threat."

VeriChip Corporation currently sells a small, under-the-skin Radio Frequency Identification capsule, or RFID, that patients can opt to have implanted, containing a number computer-linked to their medical records, enabling doctors with a special reader to access the information even if the patient is unconscious or unidentified. The company boasts its microchip, roughly the size of a grain of rice, is the only such implant approved by the U.S. Food and Drug Administration.